And the most interesting is, that Russia and Japan are still in war! I remember, that when my history teacher told me years ago about this short and slashing campaign without signing a peacy treaty I was amazed!

I already knew about it. The other Ruskie-Japanese encounter was pre-war at Khalin-Gol which many people believe set the stage for German defeat in Russia.

After the Japanese were soundly defeated at Khalkin-Gol it allowed the Soviet Union to free up Siberian reserves. These exact same reserves were those that pushed the Wehrmacht away from Moscow in the winter of 1941/42.